The Bar Graph shows the Production and Sales of Mobile handset of various companies A, B, C, D, E & F in a month.

Which Company had the highest percentage of sale with respect to its production?

We have to check the percentage of sales of all companies with respect to its production.

As we know, 

Percentage of sales : $$\frac{Unit\ sold}{Unit\ produced}\times\ 100$$

Company A : $$\frac{650}{900}\times\ 100=72.22\%$$

Company B : $$\frac{300}{700}\times\ 100=42.85\%$$

Company C : $$\frac{150}{300}\times\ 100=50\%$$

Company D : $$\frac{450}{850}\times\ 100=52.94\%$$

Company E : $$\frac{300}{550}\times\ 100=54.54\%$$

Company F : $$\frac{400}{600}\times\ 100=66.67\%$$

So, Company A has highest sales among others.

Hence, Option B is correct.